Wow. So basic.

That reminds me about dishwashers - you put powder or a tablet in a little hatch and I always wondered what happened behind the hatch, does it inject water, disolve the powder, and then pump it around to the jets?

I recently realised. Nope. It just opens the hatch ten minutes into the cycle and the tablet/powder falls into the machine with a clunk.

And many of the door latches are/were heat sensitive strips of metal. When the temperature of the water inside the machine reaches a certain point, and after a period of heating up the metal door latch, the metal deforms and the door pops open. Then after the wash, everything cools down, and the metal reforms. There is just enough tension on the metal latch to make it latch closed and just enough deflection after heating to make it spring open.

P.S. Pro-life tip: Don't forget to refill your dishwasher drying port today with Jet Dry/Glisten/Whatever brand you like, it'll stop your dishes from coming out spotty and helps with the dry cycle.

I've only used jet dry when I got free samples and never noticed a difference. I never have spotty dishes. Maybe it depends on the water.

I believe it does indeed depend on your water supply. And it doesn't help to use it if you do not use the drying cycle on your dishwasher. And here ends my limited knowledge about this nuanced, and I am sure to some, deeply interesting subject.

Wait, there's a drying port? Is that the place where I put the Rinse Aid liquid?

Mind blown. So obvious, and yet I gad always assumed it was a system like in a washing machine, as you described